Optical conductivity as a probe of a hidden Fermi-liquidbehavior in BaFe1.904Ni0.096As2

doi:10.1088/1674-1056/23/10/107401

中国物理B ›› 2014, Vol. 23 ›› Issue (10): 107401-107401.doi: 10.1088/1674-1056/23/10/107401

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Optical conductivity as a probe of a hidden Fermi-liquidbehavior in BaFe_1.904Ni_0.096As₂

杨彦兴^{a b}, 熊锐^a, 方之颢^a, 许兵^b, 肖宏^b, 邱祥冈^b, 石兢^a, 王凯^b

a School of Physics and Technology, Wuhan University, Wuhan 430072, China;
b Beijing National Laboratory for Condensed Matter Physics, National Laboratory forSuperconductivity, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2014-04-17 修回日期:2013-05-28 出版日期:2014-10-15 发布日期:2014-10-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11374345, 11104335, and 91121004) and the National Basic Research Program of China (Grant Nos. 2012CB821403, 2011CBA00107, and 2012CB921302).

Optical conductivity as a probe of a hidden Fermi-liquidbehavior in BaFe_1.904Ni_0.096As₂

Yang Yan-Xing (杨彦兴)^{a b}, Xiong Rui (熊锐)^a, Fang Zhi-Hao (方之颢)^a, Xu Bing (许兵)^b, Xiao Hong (肖宏)^b, Qiu Xiang-Gang (邱祥冈)^b, Shi Jing (石兢)^a, Wang Kai (王凯)^b

a School of Physics and Technology, Wuhan University, Wuhan 430072, China;
b Beijing National Laboratory for Condensed Matter Physics, National Laboratory forSuperconductivity, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2014-04-17 Revised:2013-05-28 Online:2014-10-15 Published:2014-10-15
Contact: Xiong Rui,Wang Kai E-mail:xiongrui@whu.edu.cn;wangkai@iphy.ac.cn
About author:74.70.Xa; 72.15.-v; 78.30.-j
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11374345, 11104335, and 91121004) and the National Basic Research Program of China (Grant Nos. 2012CB821403, 2011CBA00107, and 2012CB921302).

摘要/Abstract

摘要： We measured the infrared reflectivity of BaFe_1.904Ni_0.096As₂ single crystal from room temperature down to 20 K. Two Drude terms and a Lorentz term well describe the real part of the optical conductivity σ₁(ω). We fit the reciprocal of static optical conductivity 1/σ₁(0) by the power law ρ(T)=ρ₀+ATⁿ with n=1.6. The “broad” Drude component exhibits an incoherent background with a T-independent scattering rate 1/τ_b, while the other “narrow” one reveals a T-quadratic scattering rate 1/τ_n, indicating a hidden Fermi-liquid behavior in BaFe_1.904Ni_0.096As₂ compound.

关键词: iron-based superconductor, Fermi liquid, optical conductivity

Abstract: We measured the infrared reflectivity of BaFe_1.904Ni_0.096As₂ single crystal from room temperature down to 20 K. Two Drude terms and a Lorentz term well describe the real part of the optical conductivity σ₁(ω). We fit the reciprocal of static optical conductivity 1/σ₁(0) by the power law ρ(T)=ρ₀+ATⁿ with n=1.6. The “broad” Drude component exhibits an incoherent background with a T-independent scattering rate 1/τ_b, while the other “narrow” one reveals a T-quadratic scattering rate 1/τ_n, indicating a hidden Fermi-liquid behavior in BaFe_1.904Ni_0.096As₂ compound.

Key words: iron-based superconductor, Fermi liquid, optical conductivity

中图分类号: (Pnictides and chalcogenides)

74.70.Xa

72.15.-v (Electronic conduction in metals and alloys) 78.30.-j (Infrared and Raman spectra)

杨彦兴, 熊锐, 方之颢, 许兵, 肖宏, 邱祥冈, 石兢, 王凯. Optical conductivity as a probe of a hidden Fermi-liquidbehavior in BaFe_1.904Ni_0.096As₂[J]. 中国物理B, 2014, 23(10): 107401-107401.

Yang Yan-Xing (杨彦兴), Xiong Rui (熊锐), Fang Zhi-Hao (方之颢), Xu Bing (许兵), Xiao Hong (肖宏), Qiu Xiang-Gang (邱祥冈), Shi Jing (石兢), Wang Kai (王凯). Optical conductivity as a probe of a hidden Fermi-liquidbehavior in BaFe_1.904Ni_0.096As₂[J]. Chin. Phys. B, 2014, 23(10): 107401-107401.

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Optical conductivity as a probe of a hidden Fermi-liquidbehavior in BaFe_1.904Ni_0.096As₂

Optical conductivity as a probe of a hidden Fermi-liquidbehavior in BaFe_1.904Ni_0.096As₂

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